Paving and expansion joint structure



I 2, 1938- Afc. FISCHER 2,125,857

PAVING AND EXPANSION JOINT STRUCTURE Fil ed June 2, 1934 ATTORNEY.

Patented Aug. 2, 1938 I UNITED STATES PATENT OFFICE Albert 0. Fischer, Chicago, n1.

Application June 2, 1934, Serial No. 728,695

3 Claims.

This invention relates to an-expansion joint and paving structure,, and particularly pertains to an expansion joint or'paving structure which is adapted to provide for expansion and contraction of rigid elements which occur during chang- Generally described the invention comprises 5 an expansion joint unit comprising a hollow or tubular body portion having one or more means adapted to positively engage with spaced apart paving sections or imbedded within a monolithic layerof rigid material, such as concrete, to

serve as an expansion joint and also to serve as a means for causing crevices to appear in certain and predetermined portions of the monolithic layer. The tubular member may be made of any suitable material, typified herein by a metal means, and this tubular member may if desired be covered with a softer coating material.

For a better understanding of the invention reference may be made to the accompanying drawing, in which Figure 1 is a perspective view of an expansion joint element embodying the invention; and

Figure 2 is a sectional view of a paving structurehaving 'the expansion joint element inserted between spaced apart surfacing units.

Referring specifically to the drawing, the expansion joint element comprises a tubular body portion I having diametrically opposed projecting flanges 2, which are adapted to be imbedded and engaged with spaced apart paving sections 3 of 40 any suitable material which is employed to surface the paving structure. The paving units may suitably be prepared from concrete material;

which is adapted to be poured in place and then permited to set and harden. The expansion joint element is preferably made of metal material and the tubular body portion l is compressible to provide for contraction and expansion between the rigid elements. 1

In order 'to protect the metal material and waterproof same. it may be coated with a waterproofing coating, such as, a layer of bituminous or asphaltic composition or fibrated bituminous composition. It is also preferable to'cover both the tubular body portion l and the flanges .with

the coating material, although if desired only the tubular portion may be covered, or merely the flange members 2 may be covered.

The spaced portion 4 between the paving sections 3 and above the tubular portion of the expansion element may be filled with some plastic 5 material, such as, bituminous or asphaltic material, in order to bridge over any space between the paving sections. The same is true of the space 5, which is between the paving sections and beneath the tubular portion of the expansion in joint element.

The surfacing paving sections 3 may be applied directly to a graded surface to be covered or the paving sections may be superposed on a subas, gravel, stone or the like. 7

This expansion joint structure is also adapted for use in a monolithic paving, such as is described in Figure 1 of my Patent No. 1,898,943, which issued February 21, 1933. In such instance 20 the expansion joint element is imbedded in a monolithic layer of concrete material and thereafter, during the course of use, the weakened vertical area in the monolithic layer, by reason 7 of the tubular portion l of the expansion joint 25 element, causes cracks to appear in predetermined lines in the concrete layer. The coating material insuch instance fur-ther functions to fill and waterproof the cracks or crevices as they appear in the monolithic paving layer.

This case is a continuation in part of application Serial No. 190,086, filed May 9, 1927.

While I have described certain preferred embodiments in detail it will be understood that such detailed constructions are for the purpose 35 of illustration and notas a limitation of the in-' vention. Various changes may be made in details of construction without departing from the spirit of the invention.

I claim:

1. A paving construction comprising spaced apart portions of sections having recesses in their adjacent ends and intermediately of theirtop and bottom faces and a filler joint strip inserted between the sections, said strip comprising a closed i5 tubular body having a single hollow chamber bounded throughout its entire periphery by the wall of said body and adapted to seat in the recesses in the adjacent ends of the sections and a lateral flange projecting therefrom into the 50 adjacent paving construction.

2. A paving construction comprising spaced apart portions of sections having recesses in their adjacent ends andintermediately of their top and bottom faces and a filler joint strip inserted be- 55 layer 6, which is of any suitable material, such in 1 ends and intermediately oi their top and bottom faces and a. filler joint strip inserted between the sections, said strip comprising a tubular bodv having a single hollow chamber bounded throughout its entire periphery by the wall of said body and adapted. to seat in the recesses in the adjacent ends oi the sections and a lateral flange projecting therefrom and embedded within the paving, said wall and lateral flange being yieldabie in character.

ALBERT C. FISCHER. 

